GRAFT COPOLYMER MIXTURE WITH IMPROVED PROPERTIES AND EMPLOYMENT THEREOF AS ADHESION PROMOTER Russian patent published in 2005 - IPC

FIELD: polymer materials.

SUBSTANCE: mixture of graft copolymers useful as adhesion promoter contains following components: (i) ethylene/acrylic acid copolymer and/or ethylene/acrylic acid/acrylic acid terpolymer in amounts of 10 to 50% of the total weight of mixture; (ii) ethylene/α-olefin copolymer, 50-90 wt %; and (iii) ethylenically unsaturated dicarboxylic acids and/or anhydrides thereof, the latter being grafted to (i) and (ii) components. Mixture is prepared in single step. Laminated composite material comprises at least one layer consisting of above copolymer mixture and one or several layers selected from metal, plastic, glass, ceramics, and polymer materials. Invention makes it possible to prepare copolymer mixture containing minimum amount of grafted monomer.

EFFECT: increased adhesion strength in a wide temperature range and facilitated processing with simultaneous limited deformation relaxation and high resistance to formation of fatigue fractures.

9 cl, 2 tbl, 3 ex